Film magazine shutter control



g Feb. 22, 1944( c. B. ATY 2,342,512

FILM MAGAZINE SHUTTER CONTROL- 1 Original Filed May 24, 1941 3SheetsSheet 1 Tlcrl.

INVEN TOR. C2/N7'0N 5. GATY.

ATT RNEYS Feb. 22, 1944. c. B. GATY FILM MAGAZINE SHUTTER CONTROL 3Shets-Shet 2 Original Filed May 24, 1941 INVENTIOR. CZ/A/TON 5. 6 47%ATTO NEYS Feb. 22, 1944. c. B. GATY 5 FILM MAGAZINE SHUTTER CONTROLOriginal Fi led May 24,1941 5 Sheets-Sheet 3 ATTO EYS Patented Feb. 22%m id el'dld Aviation flora" corporation of Delete? @iinton Gets,Jamaica, N. .9 assignor to "time, .iistmaiea, It.

Original application May 24, ital, No. 395,093. Divided and thisapplication January 14, 1942, serial No. ftfiiifiii (Cl. B d-17) Ciaims.

Modern motion picture cameras, particularly.

of the 8 millimeter and 16 millimeter type are quite often provided withfilm magazine compartments adapted to receive a unitary enclosed filmmagazine which can be placed in and taken out of the magazinecompartment'at will, re-

gardless of the amount of film exposed. When such magazines are used,however, it is important'that they be properly positioned within themagazine compartment so that the film is in proper registry with thecamera lens during operation of the camera. It is also important for thefilm magazine to be held securely in proper position after beinginstalled in the camera. Such film magazines also are usually providedwith a slidable shutter which must be opened when the magazine isinstalled in the camera, and closed when the magazine is removed fromthe camera so as to prevent undesired exposure of the film. It has beencustomary in many cameras to provide some sort of manual control on theoutside of the camera for engaging a suitable abutment on the filmmagazine to operate the magazine shutter at the desired times. This typeof magazine shutter operation has proved impractical as it was foundthat when the shutter operating lever or button on the camera was out ofposition prior to insertion of the magazine, there was a tendency forthe magazine to jam or for the shutter control thereon Q to registerimperfectly with the manual control,

with the result that either the magazine shutter was not opened at all,or was only partly opened.

It is among the objects of this invention to provide a film magazinepositioning and holding construction, and an automatic magazine shuttercontrol characterized by simplicity and sturdiness and capable ofovercoming the dirficulties mentioned above in a simple and practicalmanner. Other objects will be in part apparent and in part pointed outhereinafter.

The invention accordingly consists in the features of construction,combinations of elements, and arrangements of parts as will beexemplified in the structure to be hereinafter described and the scopeof the application of which will be indicated in the following claims.

In the drawings, in which is shown one an the various possibleembodiments of the invention,

Figure 1. is an elevation of a camera oi the type under consideration;

Figure 2 is an enlarged staggered section taken along the line 2---2 ofFigure 3; and

Figure 3 is a fragmentary section taken along the line El-3 of Figure 2.

Similar reference characters refer to similar parts throughout thevarious views of the drawings.

Referring first to Figure 1, a camera generally indicated at 22 includesa casing 26 which houses the fiim magazine, shutter operating mechanism,

film feeding mechanism and drive therefor, all

as particularly described in the above-noted co" pending application.Only the structure associated with the film magazine will be gone intoherein.

As is better shown in Figure 2, camera 22 includes a casing 26 whichhas'extending longitudinally therethrough a partition 45 which dividesthe easing into a film magazine compartment 46 and an operatingmechanism compartment 41. These compartments are permanently closed atone end and are provided at the other end with a suitable closure ordoor 12 (Figure 3) which is hinged to the bottom of casing 26.Compartment 45 is dimensioned to receive a commercial film magazinegenerally indicatedat 50 (Figure 3) such as, for example, that shown inUnited States patent to O. Wittle 2,043,914. This film magazine has anopening 5| which when the magazine is properly positioned within itscompartment 46 registers with an opening 52 in a partition 53 adjacentthe camera shutter general- 1y indicated at 54. Also, film magazineopening Si is, when the magazine is correctly positioned within thecamera, in alignment with the optical axis of the camera lens system sothat upon operation of the camera the full recording area of the film isused.

Film magazine opening -5l is formed in the outer casing a (Figure 3) offilm magazine 50, and this opening is closed by an elongated slide orshutter 55 (i. e., closed when the magazine is out of the camera) whichextends from a point 55a adjacent the upper edge of opening 5! inmagazine casing 50a to a point 55b on the upper side of the magazinecasing. Shutter 55 is, of course, located within the magazine and isheld against magazine casing 50a by a strip 50b secured to the upperside of magazine casing 50a and extending in spaced relation thereto asat We and 50d along'a portion of the upper and left-hand sides of casing500. as viewed in Figure 3. The lower end of strip 50b may be secured inany suitable manner as at We to the left-hand side of the magazinecasing. Thus, strip Eiib forms with casing side We a space in whichflexible shutter 55 may slide. When magazine as is installed within thecamera, slide as is in the position shown in Figure 3. When, however,the magazine is withdrawn from its compartment in the camera, slide tois so moved, as wiil be described hereinbelow, that its end 55a is movedagainst any displacing tendency to which the between magazine casing Maand strip 5% so as to lie between opening M in the casing and aregistering opening Fit in strip tab, to prevent undesired exposure ofthe film. i

Thus when the magazine to is in the camera and as the film or is fedfrom the supply spool to the rewind spool, it passes between slide asand 2. presser plate as and across opening 5% to receive light directedtherethrough.

Still referring to Figure '3, magazine casing 500, has a slot 8d cut inthe upper side thereof adjacent the left-hand endthereof, as viewed inthis figure. Through this slot extends a pin 62, the inner end of whichis attached in any suitable manner to shutter as. When pin e2 abuts orlies near the rear edge of slot at, openings 5! and at in the magazinecasing Etc and strip 5% are open as the lower end 55a of slide 55 liesabove the. upper edges of these openings. When pin 62 abuts or liesadjacent the forward or left-hand edge of slot 80, openings 5! and asare closed,

as the lower edge of the shutter lies below the lower edges of theopenings, as viewed in Figure 3. I

A leaf spring which is generally indicated at 63 in Figure 3 has one enddta thereof secured in any suitable manner to the side of camera casing26. Midway of the ends of spring E53 are a pair of abutments 5B and t5,the former of which is preferably parallel with pin 52, and-the latterof which is inclined with respect thereto. Between spring end 630. andthe bottom 65a of abutment 65 is an inclined portiondt against which thetop of pin 62 rides when magazine 5% is inserted in compartment 66. Asthe pin passes along inclined portion to of the spring, the spring isforced upwardly so that pin 62 may ride under bottom point 85d of springabutment t5. After the pin has passed this point, spring as snaps backinto the position shown in Figure 3, wherein the pin and spring abutmentes engage as the magazine is forced farther into the camera. As soon asthese two parts, i. e., the pin and abutment 64 engage and uponcontinued movement of the magazine into its compartment, pin s2 is slidalong slot @9 until it engages the rear ex tremlty of the slot. Slot atis so dimensioned that when pin 82 engages the right=hand end thereof,as viewed in Figure 3, magazine tail is camera might be subjected. Thefree end of spring 61 is provided with a lip I0 under which a cam llriveted tothe camera door 12 is adapted to enter when the door isclosed. This action of the cam increases the stlfiness of spring 89 thusforcing spring portion at more firmly against the side of magazine at.

Spring its also includes another inclined portion 63b which extendsupwardly from the bottom oi abutment t8, and has a free end 630 whichbears against camera casing 26. As shown in Figure 2,

the lower end of portion are of spring 63 rests against the top ofmagazine so, and thus coacts with portion to of spring 81 in forcing andholding the magazine into its proper operative position.

It may now be seen that spring as (Figure 3) has a double function, i.e., that of opening the film magazine shutter when the magazine ispressed into position and that of coasting with pressure spring at inholding the film magazine in proper operative position. Furthermore byreason of the parallel relationship between abutment 64 of spring as andpin 82, a positive engagement is efiected between these parts uponinsertion of the magazine into the camera so as to insure the shutterbeing withdrawn from its closing position. The inclination of springabutment 65 from the horizontal is greater than that of spring portion5%, so that abutment 65 first causes shutter as to close, by reason ofthe engagement of pin 62 with abutment t5, and after the shutter hasbeen closed, pin 62 can ride under abutment d5, pressing'the springupwardly t r lease the magazine for complete withdrawal from the camera.-By reason of the lesser inclination of spring portion to of spring 63,there is but slight tendency of this portion of the spring to move pin62 along slot 66 when the magazine 59 is inserted in the camera, 1. e.,the vertical com zontal component that spring 63 is forced upwardlyrather than pin 62 being slid along slot Sii.

Accordingly I have provided a film magazine positioning and film shutteroperating device which fulfills the several objects set forth'hereinabove in a thoroughly practical and efficient manner. v

As many possible-embodiments may be made of the above invention and asmany changes might be made in the embodiment above set forth, it is tobeunderstood that all matter hereinbefore set forth, or shown in theaccompanying drawings, is

to be interpreted as illustrative and not in 2, limproperly positionedwith respect to partition 53a V relatively stifi spring at has one endtic thereof riveted or otherwise secured to camera casing 26 as at 68(Figure 3) and includes an elongated portiontt adapted to bear againstthe upper side of magazine hit, as shown in this ngure. By reason or thestifiness of spring ti, it holds magazine t t securely in its properoperative position iting sense.

I claim:

1. In motion picture camera constructionxin combination, a casing havinga chamber formed therein adapted to slidably receive a film magazine, afihn magazine adapted to be inserted in or withdrawn from said chamber,said film magazine having an aperture formed therein, a shutter on saidmagazine movable between open and closed positions with respect to saidaperture, a projection on said shutter extending through a slot in, saidmagazine and reciprocable to operate said shutter, a resilient member insaid chamber engageable with said shutter operating projection uponinsertion of said magazine in said casing to move said shutter to itsopen position, said it in proper operative position when installed insaid chamber, a second resilient member within id chamber operativelyassociated with said rst resilient member for engaging said magazinewhen installed in said chamber so as to coact with said first resilientmember to retain said magazine in proper operative position, a closurehingedly mounted on said casing adjacent said second member, and meanson said closure for engaging said second resilient member when saidclosure is in its chamber closing position to force said secondresilient member against said magazine.

2. In motion picture camera construction, in combination, a casinghaving a chamber formed therein adapted to slidably receive a filmmagazine, a film magazine adapted to be inserted in or withdrawn fromsaid chamber, said film magazine having an aperture formed therein, ashutter on said magazine movable between open and, closed positions withrespect to said aperture. a projection on said shutter extending througha slot in said magazine and reciprocable to operate said shutter, and aresilient member in said chamber having an abutment i'ormed thereonengageable with said shutter operating projection upon insertion of saidmagazine in said casing to move said shutter to open position, saidresilient member also including a second abutment adapted to engage saidshutter projection upon withdrawal of said magazine from said casing tomove said shutter to its closed position, said firstmentioned abutmentbeing substantially parallel to said projection and said second abutmentbeing inclined with respect to said projection, whereby upon engagementbetween said projection and said second abutment said shutter is firstmoved to its closed position and thereafter said projection underridessaid second abutment to permit withdrawal or said magazine from saidchamber.

3. In motion picture camera construction, in combination, a casinghaving a chamber formed therein adapted to slidably receive a filmmagazine, afilm magazineadaptedtobe insertedinor withdrawn from saidchamber, said film magazine having an aperture formed therein, a shutteron said e movable between open and closed positions with respect to saidaperture, a projection on said shutter extending through a slot in saidmagazine and reciprocable to operate said shutter. and a resilientmember in said chamber having an abutment formed thereon engageable withsaid shutter operating projection upon insertion of said magazine insaid casing to move said shutter to open position, said resilient memberalso including a second abutment adapted to engage said shutterprojection upon withdrawal of said magazine from said casing to movesaid shutter to its closed position, said first-mentioned abutment beingsubstantially parallel to said projection and said second-mentionedabutment being inclined with respect to said projection, whereby uponengagement between said projection and said second abutment said shutteris first moved to its closed position and thereafter said projectionunderrides said second abutment to permit withdrawal oi said magazinefrom said chamber, said resilient member also including a portionadapted to engage a side of said magazine when said magazine is insertedin said chamber to hold said magazine in proper operative positiontherein.

4. In motion picture camera construction, in combination, a casinghaving a chamber formed therein adapted to slidably receive a filmmagazine, a film magazine adapted to be inserted in or withdrawn fromsaid chamber, said film magazine having an aperture formed therein, ashutter on said magazine movable between open and closed positions withrespect to said aperture, a

projection on said shutter extending through a slot in said magazine andreciprocable to operate said shutter, and a resilient member in saidchamber having an abutment formed thereon engageable with said shutteroperating projection upon insertion of said magazine in said casing tomove said shutter to open position, said resilient member also includinga second abutment adapted to engage said shutter projection uponwithdrawal of said magazine from said casing to move said shutter to itsclosed position, said first-mentioned abutment being substantiallyparallel to said projection and said second abutment being inclined withrespect to said projection whereby upon engagement between saidprojection and said second-mentioned abutment said shutter is firstmoved to its closed position and thereafter said projection underridessaid second abutment to permit withdrawal or said magazine from saidchamber, said resilient member also including an inclined portion underwhich said projection rides to force said resilient member away fromsaid magazine upon insertion oi the magazine into said chamber, theinclination of said inclined portion being less than the inclination ofsaid second abutment to preclude movement of said projection along saidslot as said projection underrides said inclined portion.

5. In motion picture camera construction, in combination, a casinghaving a chamber formed therein adapted to slidably receive a filmmagazine adapted to be inserted in or withdrawn from said chamber, adoor for said chamber, a shutter on said magazine movable between openand closed positions with r p t to the aperture in said film magazine,said shutter having an operating projection formed thereon, resilientmeans in said camera for engaging said projection to open said shutterupon insertion of said magazine and to close said shutter uponwithdrawal of said magazine, spring means in said camera adapted toengage the magazine for holding said magazine in proper operativeposition when said door is open, and means associated with said door andoperated thereby for increasing the tension of said spring means whensaid door is closed.

CHN'I'ON B. GATY.

